Humidifier



FIG. 1 is a perspective view of a humidifier showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is an enlarged view of A in FIG. 6;

FIG. 9 is a referential view for showing an example of use of the humidifier where an upper part is separated from a lower part; and,

FIG. 10 is a referential view for showing an example of use of the humidifier where a vapor outlet is separated from the upper part.

The features shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 